Across
- 6. pollution coming from a single identifiable source
- 9. the gradual build up of a substance in an organism's body
- 10. the increased growth of algae due to fertilizer run-off
- 14. a symbiotic relationship where both species benefit
- 15. solid rock layer of soil that is impermeable by water
- 16. biotic interactions where one organism lives in, on, or neat another organism
- 17. a factor that prevents an increase in the number of organisms in a population
- 18. through the use of fertilizers, soil ____________ occurs, where there is a decrease in soil pH
- 21. the type of soil that drains well and is preferred for agriculture
- 22. a symbiotic relationship where one species benefits and the other is harmed
- 23. the covering on the ground that contains organic matter, minerals and moisture
Down
- 1. substances that become more and more concentrated in each link of a food chain
- 2. the process by which humans alter a habitat so that native species can no longer live there
- 3. the number of individuals that an ecosystem can maintain
- 4. soil _______ occurs when wind or water washes away soil
- 5. an interaction between two or more organisms who are competing for resources
- 7. using a resource faster than it can be replaced
- 8. the type of soil that blocks root growth and drains poorly
- 11. any substance added to the environment that are harmful to organisms
- 12. a symbiotic relationship where one species benefits and the other is unaffected
- 13. the long term alteration of our climate
- 19. the top layer of soil that is made of organic matter
- 20. non-native species that have been added to an ecosystem, which can disrupt food webs